import 'package:english_words/english_words.dart';
import 'package:flutter/material.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    var f = 3;
    _test(f);
    return new MaterialApp(
      title: 'Welcome to Flutter',
      theme: new ThemeData(primaryColor: Colors.white),
      home: new RandomWords(),
    );
  }

  void _test(num mNumber){
      print('The num is $mNumber');
  }
}

class RandomWordsState extends State<RandomWords> {
  final _suggestions = <WordPair>[];
  final _biggerFont = const TextStyle(fontSize: 18.0);
  final _saved = new Set<WordPair>();

  Widget _buildSuggestions() {
    Widget _buildRow(WordPair pair) {
      final alreadySaved = _saved.contains(pair);
      return new ListTile(
        title: new Text(pair.asPascalCase, style: _biggerFont),
        trailing: new Icon(
          alreadySaved ? Icons.favorite : Icons.favorite_border,
          color: alreadySaved ? Colors.red : null,
        ),
        onTap: () {
          setState(() {
            if (alreadySaved) {
              _saved.remove(pair);
            } else {
              _saved.add(pair);
            }
          });
        },
      );
    }

    return new ListView.builder(
      padding: const EdgeInsets.all(16.0),
      itemBuilder: (context, i) {
        if (i.isOdd) return new Divider();

        final index = i ~/ 2;

        if (index >= _suggestions.length) {
          _suggestions.addAll(generateWordPairs().take(10));
        }

        return _buildRow(_suggestions[index]);
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: new AppBar(
        title: new Text("Startup Name Generator"),
        actions: <Widget>[
          new IconButton(icon: new Icon(Icons.list), onPressed: _pushSaved)
        ],
      ),
      body: _buildSuggestions(),
    );
  }

  void _pushSaved() {
    Navigator.of(context).push(
      new MaterialPageRoute(
        builder: (context) {
          final tiles = _saved.map(
                (pair) {
              return new ListTile(
                title: new Text(
                  pair.asPascalCase,
                  style: _biggerFont,
                ),
              );
            },
          );

          final divided = ListTile
              .divideTiles(
                context: context,
                tiles: tiles,
              )
              .toList();

          return new Scaffold(
            appBar: new AppBar(
              title: new Text('Saved Suggestions'),
            ),
            body: new ListView(children: divided),
          );
        },
      ),
    );
  }
}


class RandomWords extends StatefulWidget {
  @override
  createState() => new RandomWordsState();
}
